200 
Annual Report of the Consulting Chemist. 
The following is an analysis which I made in the course of 
the current year of a sample of such light-brown Ichaboe guano. 
Composition of a Sample of Ichaboe Guano. 
Moisture 17*01 
*Organic matter and salts of ammonia 41 "54 
Phosphate of lime 20*18 
Carbonate of lime 1 • 89 
Alkaline salts 2*53 
Insoluble siliceous matter 16*85 
100*00 
* Containing nitrogen 10*07 
Equal to ammonia 12*23 
The sample, it will be seen, was drier and richer in ammonia 
than the preceding sample of Saldanhay Bay guano. It yielded 
12£ per cent, of ammonia, or about the same amount which 
occurs on an average in good cargoes of Guanape and Macabi 
guano, and thus has to be classed with Peruvian and other 
highly nitrogenous guanos. 
The following are the papers contributed by me to the pages 
of the March and September numbers of the ' Journal of the 
Royal Agricultural Society ' for 1876 : — 
" On the Theoretical and Practical Value of Purchased Food, 
and of its Residue as a Manure." 
2. " Annual Chemical Report for 1875." 
3. " On Phosphatic Guanos." 
Analyses made for Members of the Royal Agricultural Society from- 
December, 1875, to December, 1876. 
Superphosphates, dissolved bones, and compound) y.^ 
artificial manures \ ' 
Bone-dust 57 
Guanos 28 
Nitrate of soda 61) 
Sulphate of ammonia 7 
Potash-salts 2 
Refuse-manures 49 
Limestones, marls, ironstones, and other minerals .. 20' 
Soils .. .. 21 
Waters 63 
Sewage 3 
Sewage-manures 4 
Oil-cakes 206 
Feeding meals 15 
Milk and cream 5 
Bread 1 
Examinations for poison 7 
720' 
